STR-A6351 SanKen, STR-A6351 Datasheet - Page 3

• Manufacturer Part Number: STR-A6351
• Description: STR-A6300 Series
• Manufacturer: SanKen

STR-A6300 Application Notes
1 INTRODUCTION
STR-A6300 series is a hybrid IC with a built-in power MOSFET and a controller IC, designed for fly-back
converter type SMPS(Switching Mode Power Supply) applications, packaged into DIP8, applicable for PRC
operation only for small power SMPS.
This IC realizes downsizing and standardizing of a power supply system that reduces external components
count and simplifies circuit designs.
2 FEATURES
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(Note) PRC is abbreviation of “Pulse Ratio Control”(On-width control with fixed OFF-time).
control part
Small sized 8-pin DIP type full molded package, optimum IC for low-height SMPS
Oscillator is incorporated in the monolithic control IC with adopting On-Chip-Trimming technology.
Small temperature characteristics variation by adopting a comparator compensated for temperature in the
Low start-up circuit current(50uA max)
Built-in Active Low-Pass Filter for stabilizing the operation at light load
Avalanche energy guaranteed MOSFET with high VDSS
Built-in constant voltage drive circuit
Various kinds of protection functions
・ Pulse-by-pulse Overcurrent Protection(OCP)
・ Overvoltage Protection with latch mode (OVP)
・ Thermal Shutdown with latch mode (TSD)
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The built-in power MOSFET simplifies the surge absorption circuit since the MOSFET guarantees the
avalanche energy.
No VDSS de-rating is required.
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